In situ characterization of foreign object damage (FOD) in environmental‐barrier‐coated silicon carbide (SiC) ceramic

Kedir, Nesredin; Garcia, Ephrahim; Kirk, Cody; Guo, Zherui; Gao, Jinling; Zhai, Xiaoling; Sun, Tao; Fezzaa, Kamel; Sampath, Sanjay; Chen, Weinong W.

doi:10.1111/jace.17165

Cited by 11 publications

(4 citation statements)

References 49 publications

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“…71,72 Foreign object damage (FOD) similarly results in EBC damage and erosion, although increased particulate sizes can introduce through-thickness cracking and localized spallation of material. 73 Choi analyzed FOD on uncoated SiC/SiC CMCs at both room temperature and 1316 • C with steel ball projectiles impinging upon the specimens up to 440 m/s. 74 The CMCs showed greater resistance to FOD than monolithic ceramics due to the ability of the fibers to distribute kinetic energy through the system.…”

Section: Mechanical Erosion and Foreign Object Damagementioning

confidence: 99%

Holistic comparison of environmental barrier coating material candidates through design of a figure of merit

Ridley,

Pinnisi,

Opila

2024

J Am Ceram Soc.

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The first figure of merit for environmental barrier coating (EBC) materials was designed through a ranking system for material properties pertaining to established EBC failure modes in service. Seven past, present, and novel EBC candidate materials were used in the figure of merit design: SiO2, Ba0.75Sr0.25Al2Si2O8 (BSAS), HfSiO4, Yb2Si2O7, Yb2SiO5, Yb2O3, and YbPO4. Utilizing compiled data from the literature, the presented figure of merit verified Yb2Si2O7 as the state‐of‐the‐art candidate with optimal EBC properties and inferred that YbPO4 should be considered as a potentially viable EBC material candidate. The figure of merit allows for a holistic comparison of EBC candidates and informs experimental and computational search efforts for next‐generation complex EBCs. Clear knowledge gaps found through this work include CaO–MgO–Al2O3–SiO2 (CMAS)‐resistant coatings, EBC lifetimes before delamination, and oxidant diffusion rates in relevant EBC microstructures. It was shown that while some materials show promise for solving a single key failure mode for EBCs (i.e., CMAS reactivity), a community‐wide goal should be placed on materials development to achieve acceptable resistance against all major failure modes, which are interconnected. Novel compositionally complex EBC materials, in addition to layered EBC architectures, show promise for the optimization of material properties for long‐lifetime EBCs in combustion environments.

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Section: Mechanical Erosion and Foreign Object Damagementioning

confidence: 99%

Holistic comparison of environmental barrier coating material candidates through design of a figure of merit

Ridley,

Pinnisi,

Opila

2024

J Am Ceram Soc.

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“…However, porous coatings can also increase the rates of CMAS corrosion by providing pathways for diffusion or infiltration (Naraparaju et al, 2017;Tejero-Martin et al, 2022). Furthermore, pores can accelerate the steam corrosion of the Yb 2 Si 2 O 7 EBC top coat (Mccormack et al, 2023), affect the resistance to foreign object damage (Wellman and Nicholls, 2007;Kedir et al, 2020), and increase solid particle erosion (Presby et al, 2023). Thus, porosity is a parameter influencing TBC and EBC performance, and evaluating its evolution is important to obtain predictable performance (Nakamura et al, 2000;.…”

Section: Top Coatmentioning

confidence: 99%

Characterisation techniques for investigating TBC and EBC failure: a review

Scotson,

Paksoy,

Xiao

2024

Front. Ceram.

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Materials characterisation plays a crucial role in developing thermal barrier coatings and environmental barrier coatings for gas-turbine engines. The failure of thermal barrier coatings and environmental barrier coatings is influenced by a complex interdependence of microstructure, residual stress, and thermomechanical properties. Validating our mechanistic understanding of each of these factors that contribute to failure requires a selection of suitable characterisation techniques. Presented in this review are characterisation techniques, both ex situ and in situ, that have advanced the understanding of thermal barrier coating and environmental barrier coating failure. Targeted coating development that is both effective and efficient depends on these characterisation techniques to obtain superior coatings with improved performance and lifetime.

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“…In addition to water-vapor-induced oxidation and recession, EBCs need to be resilient against thermal and thermo-mechanical stress/strain [11][12][13][14][15][16], calcium-magnesiumaluminosilicate (CMAS) deposits [17][18][19][20][21][22], foreign object damage (FOD) [23,24], and solid particle erosion (SPE) [25][26][27]. While many of the aforementioned degradation modes have been investigated, there is still a gap in the characterization and fundamental understanding of the SPE behavior of EBCs.…”

Section: Introductionmentioning

confidence: 99%

High-Temperature Solid Particle Erosion of Environmental and Thermal Barrier Coatings

et al. 2023

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Solid particle erosion (SPE) is a common phenomenon observed in gas turbine engines. Particles entrained in the gas flow impact engine hardware, resulting in micro-scale damage that leads to deleterious effects such as material removal. For protective coatings, damage due to SPE is a key concern, since it can negatively affect the durability of the coating and subsequently the life of the underlying component. In this work, the high-temperature SPE behavior of two state-of-the-art environmental barrier coatings (EBCs) deposited via air plasma spray (APS) is investigated using alumina erodent to understand the effect of particle kinetic energy, impingement angle, and temperature. The SPE behavior of the EBCs is also compared to APS and electron beam–physical vapor deposition (EB-PVD) thermal barrier coatings (TBCs) to elucidate similarities and differences in the erosion response. The EBCs were more susceptible to SPE than the EB-PVD TBC but had greater SPE resistance compared to the APS TBC. Coating microstructure and porosity were shown to have a strong influence on the observed behavior.

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In situ characterization of foreign object damage (FOD) in environmental‐barrier‐coated silicon carbide (SiC) ceramic

Abstract: This is the author manuscript accepted for publication and has undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the Version of Record. Please cite this article as

Cited by 11 publications

References 49 publications

Holistic comparison of environmental barrier coating material candidates through design of a figure of merit

Holistic comparison of environmental barrier coating material candidates through design of a figure of merit

Characterisation techniques for investigating TBC and EBC failure: a review

High-Temperature Solid Particle Erosion of Environmental and Thermal Barrier Coatings

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